Can anyone remember having a long phone call with a teenager? mine are in their 30's and still mainly grunt at parents unless they want something? Ok Wife and daughter spend hours on the phone?Concur. If anyone fails it's because they failed. Most people pass.
With regard phonecalls home, I'm afraid parents tend to fall behind in order of priority for many young people and very often their friends or partners are more "up to speed" than poor Mum or Dad.